Nortel Networks Video Gaming Accessories 553-3001-211 Manual De Usuario

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NTAG26 XMFR card
Contents
This section contains information on the following topics:
Introduction
The XMFR (Extended Multi-frequency receiver) card is used to receive MF 
digit information. Connections are made between a PBX and a central office. 
The XMFR card can only operate in systems using µ-law companding.
You can install this card in any IPE slot. 
MF signaling
The MF feature allows the system to receive digits for 911 or feature group 
D applications.
Signaling levels
MF signaling uses pairs of frequencies to represent digits.